ss: update to bw print

Display kilobit with the standard suffix.
Add comment to describe where data rate suffixes come from.
Add support for terrabit.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

1 files changed, 8 insertions, 1 deletions

diff --git a/misc/ss.c b/misc/ss.c
index ab206b201..75fde2312 100644
--- a/misc/ss.c
+++ b/misc/ss.c
@@ -2378,16 +2378,23 @@ static int proc_inet_split_line(char *line, char **loc, char **rem, char **data)
 	return 0;
 }
 
+/*
+ * Display bandwidth in standard units
+ * See: https://en.wikipedia.org/wiki/Data-rate_units
+ * bw is in bits per second
+ */
 static char *sprint_bw(char *buf, double bw)
 {
 	if (numeric)
 		sprintf(buf, "%.0f", bw);
+	else if (bw >= 1e12)
+		sprintf(buf, "%.3gT", bw / 1e12);
 	else if (bw >= 1e9)
 		sprintf(buf, "%.3gG", bw / 1e9);
 	else if (bw >= 1e6)
 		sprintf(buf, "%.3gM", bw / 1e6);
 	else if (bw >= 1e3)
-		sprintf(buf, "%.3gK", bw / 1e3);
+		sprintf(buf, "%.3gk", bw / 1e3);
 	else
 		sprintf(buf, "%g", bw);